A Tale of Two Disks: Mapping the Milky Way with the Final Data Release of APOGEE

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A Tale of Two Disks : Mapping the Milky Way with the Final Data Release of APOGEE

Imig, Julie (författare): New Mexico State Univ, Dept Astron, POB 30001,MSC 4500, Las Cruces, NM 88033 USA.,New Mexico State University

Price, Cathryn (författare): New Mexico State Univ, Dept Astron, POB 30001,MSC 4500, Las Cruces, NM 88033 USA.,New Mexico State University

Holtzman, Jon A. (författare): New Mexico State Univ, Dept Astron, POB 30001,MSC 4500, Las Cruces, NM 88033 USA.,New Mexico State University

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Stone-Martinez, Alexander (författare): New Mexico State Univ, Dept Astron, POB 30001,MSC 4500, Las Cruces, NM 88033 USA.,New Mexico State University

Majewski, Steven R. (författare): Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia

Weinberg, David H. (författare): Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.;Ohio State Univ, Ctr Cosmol & Astro Particle Phys, Columbus, OH 43210 USA.;Inst Adv Study, Princeton, NJ 08540 USA.,Ohio State University,Institute for Advanced Study, Princeton

Johnson, Jennifer A. (författare): Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.;Ohio State Univ, Ctr Cosmol & Astro Particle Phys, Columbus, OH 43210 USA.,Ohio State University

Prieto, Carlos Allende (författare): Inst Astrofis Canarias, E-38205 San Cristobal la Laguna, Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias

Beaton, Rachael L. (författare): Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA.;Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.;Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA.,Carnegie Observatories,Princeton University,Space Telescope Science Institute

Beers, Timothy C. (författare): Univ Notre Dame, Dept Phys & Astron, Notre Dame, IN 46556 USA.;Univ Notre Dame, JINA Ctr Evolut Elements, Notre Dame, IN 46556 USA.,University of Notre Dame

Bizyaev, Dmitry (författare): New Mexico State Univ, Apache Point Observ, POB 59, Sunspot, NM 88349 USA.;Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow, Russia.,Apache Point Observatory

Blanton, Michael R. (författare): NYU, Ctr Cosmol & Particle Phys, Dept Phys, 726 Broadway,Room 1005, New York, NY 10003 USA.,New York University

Brownstein, Joel R. (författare): Univ Utah, Dept Phys & Astron, 115 S 1400 E, Salt Lake City, UT 84112 USA.,University of Utah

Cunha, Katia (författare): Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.,University of Arizona

Fernandez-Trincado, Jose G. (författare): Univ Catolica Norte, Inst Astron, Ave Angamos 0610, Antofagasta, Chile.,Catholic University of the North

Feuillet, Diane K. (författare): Lund University,Lunds universitet,Geologiska institutionen,Naturvetenskapliga fakulteten,Department of Geology,Faculty of Science

Hasselquist, Sten (författare): Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA.,Space Telescope Science Institute

Hayes, Christian R. (författare): NRC Herzberg Astron & Astrophys Res Ctr, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada.

Jönsson, Henrik (författare): Malmö University,Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM)

Lane, Richard R. (författare): Univ Bernardo OHiggins, Ctr Invest Astron, Ave Viel 1497, Santiago, Chile.,Bernardo O'Higgins University

Lian, Jianhui (författare): Yunnan Univ, South Western Inst Astron Res, Kunming 650091, Yunnan, Peoples R China.,Yunnan University

Meszaros, Szabolcs (författare): Eotvos Lorand Univ, Gothard Astrophys Observ, Szent Imre H St 112, H-9700 Szombathely, Hungary.;MTA ELTE Lendulet Momentum Milky Way Res Grp, Budapest, Hungary.;MTA ELTE Exoplanet Res Grp, Szent Imre HU 112, H-9700 Szombathely, Hungary.,Eötvös Loránd University

Nidever, David L. (författare): Montana State Univ, Dept Phys, POB 173840, Bozeman, MT 59717 USA.,Montana State University

Robin, Annie C. (författare): Univ Bourgogne Franche Comte, Inst UTINAM, CNRS, UMR 6213,OSU THETA, 41Bis Ave Observ, F-25000 Besancon, France.,Institut UTINAM - Univers, Temps-fréquence, Interfaces, Nanostructures, Atmosphère et environnement, Molécules

Shetrone, Matthew (författare): UC Santa Cruz, Univ Calif Observ, Santa Cruz, CA 95064 USA.

Smith, Verne (författare): NSFs Natl Opt Infrared Astron Res Lab, 950 North Cherry Ave, Tucson, AZ 85719 USA.

Wilson, John C. (författare): Univ Virginia, Astron Dept, Charlottesville, VA 22901 USA.,University of Virginia

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New Mexico State Univ, Dept Astron, POB 30001,MSC 4500, Las Cruces, NM 88033 USA New Mexico State University (creator_code:org_t)

Institute of Physics Publishing (IOPP), 2023
2023
Engelska.
Ingår i: Astrophysical Journal. - : Institute of Physics Publishing (IOPP). - 0004-637X .- 1538-4357. ; 954:2

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Tidskriftsartikel (refereegranskat)

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We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), alpha-element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observatory Galactic Evolution Experiment survey. We measure radial and vertical gradients, quantify the distribution functions for age and metallicity, and explore chemical clock relations across the Milky Way for the low-a disk, high-alpha disk, and total population independently. The low-alpha disk exhibits a negative radial metallicity gradient of -0.06 +/- 0.001 dex kpc(-1), which flattens with distance from the midplane. The high-alpha disk shows a flat radial gradient in metallicity and age across nearly all locations of the disk. The age and metallicity distribution functions shift from negatively skewed in the inner Galaxy to positively skewed at large radius. Significant bimodality in the [Mg/Fe]-[Fe/H] plane and in the [Mg/Fe]-age relation persist across the entire disk. The age estimates have typical uncertainties of similar to 0.15 in log(age) and may be subject to additional systematic errors, which impose limitations on conclusions drawn from this sample. Nevertheless, these results act as critical constraints on galactic evolution models, constraining which physical processes played a dominant role in the formation of the Milky Way disk. We discuss how radial migration predicts many of the observed trends near the solar neighborhood and in the outer disk, but an additional more dramatic evolution history, such as the multi-infall model or a merger event, is needed to explain the chemical and age bimodality elsewhere in the Galaxy.

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NATURVETENSKAP: NATURVETENSKAP; och Fysik; och Astronomi astrof ...

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Av lärosätet: Malmö universitet; Lunds universitet

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A Tale of Two Disks : Mapping the Milky Way with the Final Data Release of APOGEE

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